How Many People Are Named Jacilyn?
An estimated 370 people in the United States have the first name Jacilyn. It is almost exclusively a female name. The average bearer is 34 years old, and Jacilyn peaked in popularity in 1984 with 22 births that year.
Below you will find a full statistical profile of Jacilyn as a first name in the United States, including gender data, a year-by-year popularity timeline going back to 1880, a decade breakdown, and state-by-state birth registrations. You can also check how many people share the full name Jacilyn paired with any surname.
Estimated Living Americans
370
About 1 in 926,363 people in the U.S.
Rarity
Very Rare
Predicted Gender
Female
100.0% confidence
Average Age
34
years old
Peak Year
1984
22 births
Total Registered
386
since 1880
Gender Distribution for Jacilyn
Jacilyn is almost exclusively a female name. Out of 386 total births registered, 100.0% were female.
Jacilyn as a female name
Ranked #16,217 in 2021
5 female births in 2021
Peak: 1984 (22 births)
Jacilyn: Popularity Over Time
SSA records for Jacilyn span from the 1970s to the 2020s, covering 6 decades of naming data. The most popular decade for this name was the 1980s, when 150 babies were registered. Jacilyn has declined significantly from its peak in the 1980s. Recent registrations are a fraction of what they were at the name's height.
Jacilyn by Decade
How has Jacilyn tracked across different eras? The table below groups all SSA birth registrations into 10-year periods, with separate male and female counts. The colored bar shows each decade's share relative to the peak.
Jacilyn + Last Name Combinations
How many people share a full name with Jacilyn as the first name? Click a combination below to see the estimate, or search any pairing.
Names Similar to Jacilyn
Other first names starting with J with a similar number of bearers.
Jacilyn: Questions and Answers
How many people in the U.S. are named Jacilyn?
We estimate approximately 370 people named Jacilyn are alive in the United States today. This is based on SSA birth records from 1880 to 2024, adjusted for mortality using CDC life tables. About 1 in 926,363 Americans share this first name.
Is Jacilyn a common name?
Jacilyn is classified as "Very Rare" and is more popular than 81.5% of all first names in the SSA database. A total of 386 births have been registered with this name since 1880.
When was Jacilyn most popular?
Jacilyn reached peak popularity in 1984, when 22 babies were given this name. The average age of a living person named Jacilyn is approximately 34 years old, reflecting when the name was most commonly given.
Is Jacilyn a female name?
Jacilyn is predominantly female. 100.0% of people with this name are female. See the gender breakdown above for full details.
How many Jacilyn Smiths are there?
To find how many people share a specific full name, we combine first name and surname frequencies. Try: Jacilyn Smith, Jacilyn Johnson, Jacilyn Williams. You can also search any combination on our homepage.
Where does this data come from?
Our estimates use Social Security Administration birth records (1880 to 2024), adjusted for survival using CDC 2023 life tables broken down by sex. The U.S. population figure (342,754,338) is from the Census Bureau's July 2025 estimate. Full methodology.
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